Metallic packing



Patented Mar. 1 1932 UNITED STATES PATENT OFFICE WALTER R. THURSTON, 0]! LOS AN GELES, CALIFORNIA METALLIC racxme No Drawing.

, stems or other metallic members comprising 0 parts of machines, pumps, tubes,boxings or the like, so that such stuffing-boxes, axles, shafts, pistons, valve stems or members may be made leak proof against atmosphere, gas

or liquid. a

The material forming the object of the invention consists of finely divided or powdered or disintegrated metal or metals and any fluid or adhesive binder which willleave the composition in a plastic or essentially fluid state. In making my metallic packing, in various types and for various purposes I have used finely divided, powdered or disintegrated tin, aluminum, copper, lead, antimony or iron,

grease, wax, tar, pitch, asphaltum or sac:

34) other metal or combination of finely divided,

powdered or disintegrated metals and approximately two (2) pounds of graphite. These ingredients may be mixed directly, or rolled together, until the components are as intimately associated as possible. packing may be made by using another type of binder such as tar, pitch, asphaltum or saccharosate to the amount oftwo (2) pounds and adding ninety-seven (97) pounds, or less, of finely divided, powdered or disintegrated lead or other metal or a combination of finely divided, powdered or disintegrated metals, and approximately two (2) pounds of graphite. These ingredients may be mixed director combinations of these metals with wool Or, this 1y or rolled together, or, in the process of Application filed August 29 1928. Serial No. 302,892.

making, heated to'any temperature which can be sustained by the binder without altering its form and which is less than the fusing point of the metal factors, and then mixed, when so heated, until the components are as intimately associated as possible. The fiuid- I ity, plasticity or stiffness of the packing will be governed by the amounts and kind or kinds or combinations of the metals introduced into the fluid or binder. -Whether added to the mixture or not, I use a small pro portion of graphite as a facing for the finished product. I

The metallic packing described may be made, moulded or fitted in sheets, bars, coils, 6

rings or other shapes, either to be used alone or in conjunction with solid metal washers or packings, or with leather, composition, rubber, fabric or other types of packings, or in combination with them. Its fluid and plastic quality enables it to be squeezed against any movable mechanical part, or introduced into any boxing or stufling box or bearing, thereby forming at once a seal and a plastic bearing of anti-friction quality. In this con- 7 nection I have used it with success in water, pumps and Various other kinds of stuffingboxes and bearings.

Iclaim:

A packing composed of 90% finely divided lead, 8% wool grease, and 2% graphite.

In testimony whereof, I aflix my signature.

WALTER R. THURsToN. 

